diff --git a/crates/rrt-cli/src/main.rs b/crates/rrt-cli/src/main.rs
index 40de4ac..1c71a5a 100644
--- a/crates/rrt-cli/src/main.rs
+++ b/crates/rrt-cli/src/main.rs
@@ -347,6 +347,9 @@ struct RuntimeCompactEventDispatchClusterReport {
     add_building_condition_tuple_map_counts: BTreeMap<String, usize>,
     add_building_signature_condition_cluster_occurrence_counts: BTreeMap<String, usize>,
     add_building_signature_condition_cluster_map_counts: BTreeMap<String, usize>,
+    add_building_signature_condition_cluster_descriptor_keys: BTreeMap<String, Vec<String>>,
+    add_building_signature_condition_cluster_non_add_building_descriptor_keys:
+        BTreeMap<String, Vec<String>>,
 }
 
 #[derive(Debug, Serialize)]
@@ -373,6 +376,9 @@ struct RuntimeCompactEventDispatchClusterCountsReport {
     add_building_condition_tuple_map_counts: BTreeMap<String, usize>,
     add_building_signature_condition_cluster_occurrence_counts: BTreeMap<String, usize>,
     add_building_signature_condition_cluster_map_counts: BTreeMap<String, usize>,
+    add_building_signature_condition_cluster_descriptor_keys: BTreeMap<String, Vec<String>>,
+    add_building_signature_condition_cluster_non_add_building_descriptor_keys:
+        BTreeMap<String, Vec<String>>,
 }
 
 #[derive(Debug, Clone, Serialize)]
@@ -1858,6 +1864,10 @@ fn run_runtime_inspect_compact_event_dispatch_cluster_counts(
                 .add_building_signature_condition_cluster_occurrence_counts,
             add_building_signature_condition_cluster_map_counts: report
                 .add_building_signature_condition_cluster_map_counts,
+            add_building_signature_condition_cluster_descriptor_keys: report
+                .add_building_signature_condition_cluster_descriptor_keys,
+            add_building_signature_condition_cluster_non_add_building_descriptor_keys: report
+                .add_building_signature_condition_cluster_non_add_building_descriptor_keys,
         },
     };
     println!("{}", serde_json::to_string_pretty(&output)?);
@@ -1891,6 +1901,9 @@ fn build_runtime_compact_event_dispatch_cluster_report(
     let mut add_building_signature_condition_cluster_occurrence_counts =
         BTreeMap::<String, usize>::new();
     let mut add_building_signature_condition_cluster_map_counts = BTreeMap::<String, usize>::new();
+    let mut signature_condition_cluster_descriptor_keys =
+        BTreeMap::<String, BTreeSet<String>>::new();
+    let mut add_building_signature_condition_clusters = BTreeSet::<String>::new();
     let mut dispatch_descriptor_occurrences =
         BTreeMap::<String, Vec<RuntimeCompactEventDispatchClusterOccurrence>>::new();
     let mut unknown_descriptor_occurrences =
@@ -1976,12 +1989,18 @@ fn build_runtime_compact_event_dispatch_cluster_report(
                     rows: rows.clone(),
                 };
                 let descriptor_key = compact_event_dispatch_descriptor_key(descriptor_id, &rows);
+                signature_condition_cluster_descriptor_keys
+                    .entry(signature_condition_cluster_key.clone())
+                    .or_default()
+                    .insert(descriptor_key.clone());
                 *dispatch_descriptor_occurrence_counts
                     .entry(descriptor_key.clone())
                     .or_insert(0) += 1;
                 map_descriptor_keys.insert(descriptor_key.clone());
                 if compact_event_dispatch_add_building_descriptor_id(descriptor_id) {
                     record_has_add_building = true;
+                    add_building_signature_condition_clusters
+                        .insert(signature_condition_cluster_key.clone());
                     *add_building_descriptor_occurrence_counts
                         .entry(descriptor_key.clone())
                         .or_insert(0) += 1;
@@ -2063,6 +2082,29 @@ fn build_runtime_compact_event_dispatch_cluster_report(
                 .map(|label| format!("{descriptor_id} -> {label}"))
         })
         .collect::<Vec<_>>();
+    let add_building_signature_condition_cluster_descriptor_keys =
+        add_building_signature_condition_clusters
+            .iter()
+            .map(|cluster| {
+                let keys = signature_condition_cluster_descriptor_keys
+                    .get(cluster)
+                    .map(|keys| keys.iter().cloned().collect::<Vec<_>>())
+                    .unwrap_or_default();
+                (cluster.clone(), keys)
+            })
+            .collect::<BTreeMap<_, _>>();
+    let add_building_signature_condition_cluster_non_add_building_descriptor_keys =
+        add_building_signature_condition_cluster_descriptor_keys
+            .iter()
+            .map(|(cluster, keys)| {
+                let filtered = keys
+                    .iter()
+                    .filter(|key| !key.contains("Add Building"))
+                    .cloned()
+                    .collect::<Vec<_>>();
+                (cluster.clone(), filtered)
+            })
+            .collect::<BTreeMap<_, _>>();
 
     Ok(RuntimeCompactEventDispatchClusterReport {
         maps_scanned: input_paths.len(),
@@ -2089,6 +2131,8 @@ fn build_runtime_compact_event_dispatch_cluster_report(
         add_building_condition_tuple_map_counts,
         add_building_signature_condition_cluster_occurrence_counts,
         add_building_signature_condition_cluster_map_counts,
+        add_building_signature_condition_cluster_descriptor_keys,
+        add_building_signature_condition_cluster_non_add_building_descriptor_keys,
     })
 }
 
diff --git a/docs/rehost-queue.md b/docs/rehost-queue.md
index 181312e..1cffb42 100644
--- a/docs/rehost-queue.md
+++ b/docs/rehost-queue.md
@@ -313,6 +313,13 @@ Working rule:
     `FarmGrain`/`Logging Camp` clusters on `nondirect-ge34-h0002-0007-0004-73|75|7b|85...` with
     condition family `[7:4,42:0]`; that narrows the remaining trigger-kind/source question to a
     small set of compact subfamilies rather than a single undifferentiated add-building carrier
+  - the first exclusivity pass is positive too:
+    the widened cluster-counts report now surfaces, for each add-building
+    signature/condition cluster, the descriptor keys that share it plus the
+    non-add-building subset. Current targeted checks on `Texas Tea.gmp` and `Alternate USA.gmp`
+    show those observed add-building clusters have empty non-add-building companions, which biases
+    the next source/trigger-kind pass toward a distinct add-building compact subfamily rather than
+    a generic dispatch carrier reused by variable-band rows
   - the same probe now narrows the candidate runtime-effect set too:
     it reports which decoded records already carry grouped opcodes in the grounded
     `0x00431b20` dispatch strip; real `War Effort.gmp` currently narrows that to record indexes